Data recording medium, data reproducing method and reproducing device, and data processing system

ABSTRACT

A data recording medium on which digital data including work data such as a music tune or an image is recorded in a data recording area, and on which identification information enabling identification particular to the recording medium is recorded in an identification information recording area, whereas discrimination information indicating the presence/absence of the identification information is recorded in a lead-in area. The location of the digital data recorded on the recording medium is managed in accordance with the identification information for carrying out identification proper to the recording medium recorded on the recording medium, thus realizing multiple uses of the work data, such as duplication for a plurality of times.

TECHNICAL FIELD

This invention relates to a data recording medium on which digital dataincluding work data such as a music tune is recorded and on whichidentification information enabling identification proper to therecording medium is recorded, a reproducing method and device forreproducing the work data recorded on the data recording medium, and adata processing system for managing duplication of the work datarecorded on the data recording medium.

BACKGROUND ART

Compact discs (CDs) are widely used as disc-shaped recording media onwhich digital data converted from audio data such as a music tune aswork data is recorded and which enable reading of the data by opticalreproducing means. A CD is a recording medium having a diameter of 12 cmand capable of recording data of not less than 600 MB. On such a CD,digital data is recorded on the basis of a standardized recordingformat. Based on the standard recording format of the CD, there areprovided CD-ROMs on which data to be processed by computers orapplication software for television games is recorded, CD-Rs whichenable writing of data once, CD-RWs which enable rewriting of data, andso on.

As data recording media on which digital data converted from imageinformation of high quality or the like is recorded, DVDs (digitalversatile discs) are provided.

CDs and DVDs are recording media which enable mass duplication and massdistribution of data from original discs. CDs and DVDs on which the samework data such as music tunes or video information is recorded havebasically the same format, and each of the discs is housed anddistributed in a container having a common form or design.

In order to identify so-called package media such that independentrecording media having common work data recorded thereon are housed anddistributed in respective common containers, serial numbers are printedon or seals having serial numbers printed thereon are attached to thecontainers housing the recording media or printed matters housedtogether with the recording media in the containers.

In the case where serial numbers are provided on the containers or theprinted matters housed in the containers of the package media asdescribed above, identification to discriminate other recording media ofthe same type cannot be carried out simply with the recording mediathemselves. In the case where seals having serial numbers printedthereon are peeled off or the containers or printed matters havingserial numbers printed thereon are lost, the correspondence between theserial numbers and the recording media cannot be achieved and the serialnumbers themselves cannot be recognized. Moreover, when recording mediaalone are handed to other people, it is difficult to manage therecording media.

In the case of the conventional package media that are widelydistributed, once the package medium is sold to a user, the user canfreely use the work data recorded on the recording medium but repeatedduplication of the data read out from the recording medium is regulated.Therefore, providing the work data from the user who purchased thepackage medium to another user via a data distribution system such asthe Internet is also regulated.

Moreover, as a method for distributing work data based on the contentssuch as music tunes, EMD (electronic music distribution) is used, whichis a method utilizing the Internet. The work data distributed by thisEMD is purchase-type data similar to the package media. The user canfreely use the work data but repeated distribution or duplication of theonce distributed data is regulated.

DISCLOSURE OF THE INVENTION

Thus, it is an object of the present invention to provide a datarecording medium which enables identification between data recordingmedia of the same type having the same work data recorded thereon, thusenabling secure management of the data recording media having the workdata recorded thereon, and a data reproducing method and reproducingdevice for the data recorded on this data recording medium.

It is another object of the present invention to provide a datarecording medium and a data processing system which enable multiple useof work data recorded on one data recording medium such as duplicationfor a plurality of times while realizing management of the location ofthe work data recorded on the data recording medium.

It is still another object of the present invention to provide a dataprocessing system which enable protection of the interest of a copyrightholder of work data recorded on a data recording medium and protectionof the interest of an information provider who contributed todistribution of the work data.

A data recording medium according to the present invention has recordedthereon digital data including work data, and has recorded thereon inadvance identification information which enables identification properto the recording medium and discrimination information indicating thepresence/absence of the identification information.

The identification information which enables identification proper tothe recording medium is information which enables identification todiscriminate from other recording media, and the identificationinformation includes information for identifying individual contentsconstituting the work data recorded on the recording medium.

As management of the work data recorded on the recording medium iscarried out on the basis of the identification information recorded onthe recording medium for carrying out identification proper to therecording medium, even when the work data is transmitted or duplicatedonto another recording medium, management of location of the work datarecorded on the original recording medium can be securely carried outand duplication of the work data or the like can be easily managed.

In a data reproducing method and device for reproducing a data recordingmedium according to the present invention, discrimination informationindicating whether identification information recorded on the datarecording medium for carrying out identification proper to the recordingmedium exists or not is read out, and when it is discriminated by thediscrimination information that the identification information exists,the identification information is read out. The data reproducing methodis controlled in accordance with the result of discrimination by thediscrimination information, and reproduction of second digital datarecorded by a recording method different from the recording method offirst digital data is made possible.

The present invention also provides a system which enables repeatedduplication of data recorded on a data recording medium having digitaldata recorded thereon and having recorded thereon in advanceidentification information enabling identification proper to therecording medium and discrimination information indicating thepresence/absence of the identification information. The systemcomprises: information providing means for providing informationobtained by duplicating at least the digital data recorded on the datarecording medium and then adding information provider identificationinformation to the duplicated digital data; access means for accessingthe information providing means to download at least the digital dataduplicated from the data recording medium, having the informationprovider identification information added thereto and recorded in theinformation providing means; and work data managing means to which theinformation provider identification information generated by theinformation providing means and the information provider identificationinformation downloaded by the access means are transmitted.

When at least the information provider identification informationdownloaded from the information providing means is transmitted from theaccess means, the work data managing means performs accounting toreproducing means, and collates the information provider identificationinformation transmitted from the information providing means and theinformation provider identification information transmitted from theaccess means and totals the coincident information provideridentification information. The work data managing means providescompensation to the information providing means in accordance with thequantity of coincidence between the information provider identificationinformation transmitted from the information providing means and theinformation provider identification information transmitted from theaccess means.

The present invention also provides a system which enables repeateddistribution of work data recorded on a data recording medium having thework data recorded thereon and having recorded thereon in advanceidentification information enabling identification proper to therecording medium and discrimination information indicating thepresence/absence of the identification information. The systemcomprises: information providing means for providing informationobtained by duplicating at least digital data recorded on the datarecording medium and then adding information provider identificationinformation to the duplicated digital data; access means for accessingthe information providing means to download at least the digital dataduplicated from the data recording medium, having the informationprovider identification information added thereto and recorded in theinformation providing means; and work data managing means to which theinformation provider identification information generated by theinformation providing means and the information provider identificationinformation downloaded by the access means are transmitted.

The present invention further provides an information transmittingdevice comprising: at least one terminal section for reproducing arecording medium having recorded thereon first digital data related to awork and second digital data including identification information properto the medium and address data indicating a homepage address; and atleast one server section connected to the terminal section via acommunication channel and designated by the address data. The serversection of the device identifies the identification information of therecording medium supplied from the terminal section via thecommunication channel, and permits downloading of the digital datarelated to the work to the terminal section when the result ofidentification indicates that the terminal section is a normal terminalsection.

The present invention further provides an information transmittingmethod for transmitting identification information of a recording mediumfrom at least one terminal section for reproducing a duplicate recordingmedium duplicated from the recording medium having recorded thereonfirst digital data related to an encrypted work and second digital dataincluding at least identification information proper to the medium, to ahost section via a communication channel. The method comprises the stepsof: authenticating, at the host section, the identification informationproper to the recording medium transmitted thereto; requesting theterminal section for accounting; and transmitting data related to a keyfor decryption of the first digital data to the terminal section whenaccounting is carried out.

The terminal section reproduces the first digital data on the duplicaterecording medium on the basis of the data related to the key transmittedthereto.

The host section totals the identification information proper to therecording medium transmitted from the terminal section, then totals thequantity of duplication for each recording medium, and calculates thedistribution rate for distributing at least a part of the fee collectedby accounting to the owner of the recording medium.

Other objects and advantages of the present invention will be clarifiedfurther from the following description of embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows the schematic structure of a disc-shaped recording mediumaccording to the present invention.

FIG. 2 illustrates an example of the recording format of individual IDdata, which is identification information for carrying outidentification proper to the disc-shaped recording medium.

FIG. 3 is a block diagram showing the schematic structure of areproducing device used for reproduction of the disc-shaped recordingmedium according to the present invention.

FIG. 4 is a flowchart for explaining the procedure for reproducing datarecorded on the disc-shaped recording medium according to the presentinvention.

FIG. 5 is a flowchart for explaining the procedure for authenticatingthe individual ID.

FIG. 6 illustrates an example in which the individual ID is directlyread out to switch the reproducing operation.

FIG. 7 illustrates an example of the procedure for manufacturing thedisc-shaped recording medium according to the present invention.

FIG. 8 illustrates the schematic structure of a cutting device formanufacturing an original disc used for manufacturing the disc-shapedrecording medium according to the present invention.

FIG. 9 is a flowchart for explaining an example of the usage of thedisc-shaped recording medium according to the present invention.

FIG. 10 illustrates an exemplary system for using the disc-shapedrecording medium according to the present invention.

FIG. 11 is a flowchart for explaining the procedure for carrying outcommunication of data recorded on the disc-shaped recording mediumaccording to the present invention.

FIG. 12 is a flowchart for explaining another example of the procedurefor carrying out communication of data recorded on the disc-shapedrecording medium according to the present invention.

FIG. 13 is a block diagram showing another example of the reproducingdevice used for reproducing the disc-shaped recording medium accordingto the present invention.

FIG. 14 illustrates another example of the recording format ofindividual ID, which is identification information for carrying outidentification proper to the disc-shaped recording medium, recorded onthe disc-shaped recording medium according to the present invention.

FIG. 15 shows a data processing system for carrying out processing ofdata recorded on the disc-shaped recording medium according to thepresent invention.

FIG. 16 shows another example of the processing system for carrying outprocessing of data recorded on the disc-shaped recording mediumaccording to the present invention.

FIG. 17 shows a recording format of data obtained by duplication fromdata recorded on the disc-shaped recording medium according to thepresent invention.

FIG. 18 shows another example of the recording format of data obtainedby duplication from data recorded on the disc-shaped recording mediumaccording to the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

A data recording medium according to the present invention, a datareproducing method and device for reproducing data recorded on the datarecording medium, and a data processing system for duplicating anddistributing work data recorded on the data recording medium will now bedescribed.

First, the data recording medium according to the present invention willbe described. This data recording medium is a disc-shaped recordingmedium 1 and has a data recording area 2 in which main data such as workdata or the like based on contents such as a music tune is recorded anda lead-in area 3 provided on the inner side than the data recording area2. Moreover, an identification information recording area 4 in whichidentification information enabling identification proper to therecording medium is recorded is provided on the inner side than thelead-in area 3 as shown in FIG. 1.

More specifically, first digital data recorded in a recording formatwhich is conventionally used for CDs (compact discs) and DVDs (digitalversatile discs) and second digital data recorded in a recording formatdifferent from the recording format of the first digital data arerecorded on the disc-shaped recording medium 1.

The first digital data is work data based on contents such as a musictune or an image and constitutes main data recorded on the disc-shapedrecording medium 1. The second digital data is combined with the firstdigital data to form audio data of high quality or constitutes a part ofwork data recorded as the first digital data, for example, data ofeither a song or a music tune when the work data includes both. Thesecond digital data may be compressed audio data or image data, or textdata. The specific contents of the data may be a poster, jacket, lyrics,liner notes, interview article, information of a new song and the like,attached to the first digital data. When the first digital data is workdata related to audio data, the second digital data is lot informationfor concert tickets with respect to the performer of the work, Internetlive viewing information or the like. The second digital data alsoincludes data related to the distribution source for supplying the workdata corresponding to the first digital data, or URL (homepage address)as the address of the writer including the performer via a communicationnetwork such as the Internet.

The second digital data, added to the first digital data and thusrecorded, is recorded by changing the shape of recording pitsconstituting the first digital data or the position in the directionorthogonal to the direction of recording tracks of the recording pits.Therefore, the second digital data can be reproduced without affectingthe data reproduction of the first digital data. That is, when areproducing device capable of reproducing only digital data compatiblewith the recording format of the first digital data is used,reproduction of the first digital data alone is possible, and when areproducing device capable of reproducing the second digital data aswell as the first digital data is used, reproduction of the first andsecond digital data is possible. Thus, upward compatibility isguaranteed. Specifically, the first digital data is recorded byso-called pit edge recording in which the data is modulated by the edgeor length in the longitudinal direction of the recording track of therecording pits, while the second digital data is recorded by displacingthe recording pits in the tracking direction of the direction of trackwidth orthogonal to the recording tracks or by changing the width of therecording pits in the direction of track width. When reproducing thefirst digital data by using the reproducing device capable ofreproducing only the first digital data, the quantity of changes of theposition and shape of the recording pits is limited to a range of errorswhich enables reading of the first digital data and which does notaffect the reproduction of the first digital data.

On the disc-shaped recording medium 1 according to the present inventionon which the first digital data and the second digital data having thedifferent recording format from that of the first digital data arerecorded, identification information proper to the recording medium orindividual ID data for identifying individual recording media isrecorded. The identification information or individual ID data isrecorded in a recording format which can be read by an optical head forrecording the first and second digital data. In the example of FIG. 1,the identification information or individual ID data is recorded in theidentification information recording area 4 provided on the inner sidethan the lead-in area 3 provided on the inner side than the datarecording area 2 in which at least the first digital data is recorded.

The recording area for the identification information or individual IDdata is not limited to the identification information recording area 4provided on the inner circle on the disc-shaped recording medium 1. Theidentification information or individual ID data may also be recorded inan area outer than a lead-out area provided on the outer side than thedata recording area 2 in which at least the first digital data isrecorded, or in a part of the lead-in area. With respect to read-onlyoptical discs on which data is recorded on the basis of the recordingformat of CD and DVD, mass production of the same type of discs iscarried out by using a stamper for transferring recess/protrusionpatterns corresponding to digital data to be recorded. Thus, theidentification information or individual ID data is recorded by writingdirectly onto a reflection film of each recording medium at or aroundthe final step of the manufacturing process for the recording medium.The manufacturing method for the disc-shaped recording medium on whichthe individual identification information or individual ID data isrecorded will be described later.

The individual identification information or individual ID data recordedon the above-described disc-shaped recording medium 1 is recorded on thebasis of a recording format as shown in FIG. 2. In FIG. 2, for example,leading 32 bits form a synchronization (Sync) part and an areasubsequent to the synchronization part is a recording part in which theindividual identification information or individual ID data is recorded.The individual identification information or individual ID data recordedin the recording part has its information converted, more specifically,encrypted and then recorded. Therefore, the recording part in which theindividual identification information or individual ID data is recordedis an encryption area. The encryption area is constituted by, forexample, a total of 128 bits including record company ID data of 16bits, medium number of 32 bits, manufacturing device ID data of 16 bits,serial number of 48 bits, and an error correction code (ECC-A) or errordetection code (EDC-A) of 16 bits.

The record company ID data is information specifying the copyrightholder who owns or administers the copyright for producing or supplyingeach content such as music constituting the work data recorded on thedisc-shaped recording medium. The medium number is used for carrying outdistribution and registration of the disc-shaped recording medium. Themanufacturing device ID data is information specifying the device formanufacturing the disc-shaped recording medium, and is also informationidentifying the manufacturing device for recording the 48-bit serialnumber. The manufacturing device ID data itself is also used as a partof information of the individual ID data for carrying out identificationproper to the disc-shaped recording medium. The 48-bit serial number isa main part of the identification information or individual ID data foridentifying individual disc-shaped recording media. The serial numbercan be freely allocated by the first record company that distributes therecording medium and need not be consecutive numbers. Following theencryption area, for example, an error correction code (ECC-B) of 64bits is provided. Thus, a total 224 bits are provided as a wholeincluding the leading synchronization part.

As for the 16-bit error correction code (ECC-A) or error detection code(EDC-A), for example, a generating polynomial is generated by a CRC(cyclic redundancy code) as follows.g(x)=x ¹⁶ +x ¹² +x ⁵+1This generating polynomial g(x) may be arbitrarily set by the firstrecord company that distributes the disc-shaped recording medium. Thus,haphazard “bit strings” can be securely eliminated. The purpose of thiscode is different from that of the 64-bit error correction code (ECC-B)and this code is used for authentication of the individual ID data,instead of original error correction or error detection. That is,whether such individual ID data exists or not can be discriminated.

As for the 64-bit error correction code (ECC-B), for example, thefollowing generating polynomial is used.f(x)=x8+x4+x3+x2+1In the case of f(á)=0, the following (24, 16, 9) Reed-Solomon code isused.G(x)=(x+1)(x+á)(x+á2) . . . (x+á7)This code has the correction capability which enables detection andcorrection of 4 bytes or extinction and correction of 8 bytes.

In short, of the two or more error correction codes (ECCs) or errordetection codes (EDCs), one is used for original error correction anderror detection and the other is used for authentication of theidentification information or individual ID data for carrying outidentification proper to the disc-shaped recording medium.

The data of, for example, 128 bits, recorded in the encryption area andindicating the identification information or individual ID data isprotected from stealing as it is encrypted in accordance with a commonkey system such as the RSA (Rivest, Shamir and Adleman) public keysystem or the DES (data encryption standard) system.

The format of the individual ID data shown in FIG. 2 is only an example,and the number of bits and arrangement of each area can be arbitrarilyset and the number of kinds of areas may be increased or decreased. Forexample, work ID data specifying the individual work data recorded onthe disc-shaped recording medium 1 may be recorded. The work ID data isrecorded in accordance with ISRC (International Standard RecordingCode).

Moreover, by writing a part of the information of the individual IDdata, for example, the manufacturing device ID data, into apredetermined part of the second digital data recorded in the datarecording area 2 provided on the disc-shaped recording medium 1 shown inFIG. 1, the safety and reliability of illegal copy prevention or thelike can be improved.

Furthermore, presence/absence discrimination information indicatingwhether the individual ID exists or not is recorded at a predeterminedposition, for example, in a user area or the like, in the lead-in area 3on the disc-shaped recording medium 1 shown in FIG. 1. This informationmay be used as the presence/absence discrimination information for theindividual ID data or as discrimination information indicating whetheror not the recording medium is a recording medium such that the seconddigital data of the different recording format from that of the firstdigital data is added to the first digital data. Conversely, thediscrimination information indicating whether or not the recordingmedium is a recording medium such that the second digital data of thedifferent recording format from that of the first digital data is addedto the first digital data may be used as the presence/absencediscrimination information for the individual ID data. Such informationmay be collectively recorded as one piece of discrimination information.

The reproducing device according to the present invention using thedisc-shaped recording medium 1 on which first digital data and seconddigital data of a recording format different from that of the firstdigital data are recorded and on which identification information orindividual ID data proper to the recording medium is recorded, as shownin FIG. 1, will now be described.

As shown in FIG. 3, the reproducing device has an optical head 11 forscanning the area where data is recorded on the disc-shaped recordingmedium 1 which is loaded on this device and rotationally driven by aspindle motor 16, and thus reading out the data recorded on therecording medium 1. The data recorded on the disc-shaped recordingmedium 1 and read out by the optical head 11 is supplied to an RFamplifier 12. A reproduction RF signal outputted from the RF amplifier12 is sent to and EFM-demodulated by an EFM (eight-to-fourteenmodulation) demodulation circuit 13 and then sent to a lead-in readingcircuit 14. Various signals for servo such as a tracking error signaland a focusing error signal outputted from the RF amplifier 12 and areproduction clock signal from the EFM demodulation circuit 13 aresupplied to a servo circuit 15, and various servo signals such as atracking servo signal and a focusing servo signal are outputted from theservo circuit 15. A spindle servo signal outputted from the servocircuit 15 is supplied to the spindle motor 16 for rotational driving ofthe disc. The tracking servo signal and the focusing servo signal aresupplied to an actuator of the optical head 11, thus carrying outtracking servo and focusing servo. A thread servo signal is supplied toa thread driving motor of a thread mechanism 17 for moving the opticaldisc 11 in the radial direction of the disc-shaped recording medium.Between the servo circuit 15 and a CPU (processor unit) 18, controlcommands and control data are transmitted and received, for example, viaa bus.

The lead-in reading circuit 14 supplies the data read out from thelead-in area 3 on the disc-shaped recording medium 1 by the optical head11 to a presence/absence discrimination circuit 21. The presence/absencediscrimination circuit 21 discriminates whether or not discriminationinformation indicating the presence/absence of individual ID data forcarrying out identification proper to the recording medium is includedin the data read out from the lead-in area 3. In the case where thepresence/absence discrimination circuit 21 determined that thediscrimination information is absent, the reproducing device shown inFIG. 3 identifies the disc-shaped recording medium loaded thereon as adisc-shaped recording medium on which only the first digital data inaccordance with the recording format based on the CD or DVD format isrecorded. The reproducing device carries out reproduction of the data onthe disc-shaped recording medium loaded thereon and outputs thereproduced data from an output terminal 22.

In the case where the presence/absence discrimination circuit 21determined that the discrimination information is present, thereproducing device supplies a control signal to the lead-in readingcircuit 14 so as to move the optical head 11 again to the innermostcircle on the disc-shaped recording medium 1, thus reading out theinformation recorded in the lead in area 3. At the same time, thereproducing device turns on a switch 23 for selecting a reproductionmode and supplies a signal including the individual ID data suppliedfrom the lead-in reading circuit 14 to an individual ID identificationcircuit 24. In this example, it is assumed that the individual ID dataor identification information is also recorded in the lead-in area 3.However, in the case where the individual ID data or identificationinformation is recorded in the identification information recording area4 provided on the inner side than the lead-in area 3 as in thedisc-shaped recording medium 1 shown in FIG. 1, the reproducing devicereads out the information recorded in the identification informationrecording area 4 and sends the information to the individual IDidentification circuit 24. The individual ID identification circuit 24discriminates whether the individual ID data is normally identified ornot. When the read-out individual ID data is normally identified (OK),the second digital data recorded on the disc-shaped recording medium 1is reproduced in addition to the first digital data and the reproduceddata is outputted from a first output terminal 25. When the individualID data cannot not be normally identified (NG), a digital datareproduction prohibition signal is outputted from a second outputterminal 26.

The reproducing operation of the reproducing device according to thepresent invention will be described further in detail with reference toFIG. 4.

First, at step S41, the disc-shaped recording medium 1 is loaded on thereproducing device and the lead-in area 3 on the loaded disc-shapedrecording medium 1 is accessed by the optical head 11, thus reading outthe information recorded in the lead-in area 3. At step S42, thediscrimination information indicating the presence/absence of individualID data is discriminated by the presence/absence discrimination circuit21. When it is determined that the discrimination information ispresent, the processing goes to step S43. When it is determined that thediscrimination information is absent, the processing goes to step S47.

At step S43, whether the individual ID data exists or not isdiscriminated by the presence/absence discrimination circuit 21 on thebasis of the discrimination information. When the result is YES, theprocessing goes to step S44. When the result of discrimination at stepS43 is NO, the processing goes to step S46 to stop or prohibit thereproduction mode of data corresponding to the work data. Although thediscrimination at step S43 may be only the discrimination as to whetherthe individual ID data is actually written or not, whether theindividual ID data is normally recognized or not may also bediscriminated by using the error correction code (ECC-A) and the errordetection code (EDC-A) in the case where the individual ID data has theformat shown in FIG. 2. At step S44, it is discriminated by thepresence/absence discrimination circuit 21 whether or not the seconddigital data having the different recording format from that of thefirst digital data is present on the loaded disc-shaped recording medium1. When the result is YES, the processing goes to step S45 to select thereproduction mode for reproducing the disc-shaped recording medium 1according to the present invention on which the first and second digitaldata are recorded, thus reproducing the first and/or second digitaldata. When the result of discrimination at step S44 is NO, theprocessing goes to step S46 to stop or prohibit the reproduction mode.

The discrimination at step S44 as to whether or not the second digitaldata is recorded on the loaded disc-shaped recording medium 1 can becarried out, for example, by detecting the presence/absence of a levelchange in a signal which is obtained by taking the differential ofdetection signals from two photodetector sections of a photodetector ofthe optical head 1 having a boundary parallel to the recording track,that is, a so-called push-pull signal.

At step S47, whether the individual ID data exists or not isdiscriminated by the presence/absence discrimination circuit 21. Whenthe result is YES, the processing goes to step S46 to stop thereproduction mode. When the result is NO, the processing goes to stepS48. At step S48, it is discriminated whether or not the second digitaldata recorded in the different recording format from that of the firstdigital data is present in addition to the first digital data on theloaded disc-shaped recording medium 1, for example, by using a methodsimilar to the discrimination method of step S44. When the result isYES, the processing goes to step S46 to stop the reproduction mode. Whenthe result is NO, the processing goes to step S49 to select thereproduction mode for reproducing the first digital data, thusreproducing the data recorded on the disc-shaped recording medium 1.

Steps S47 and S48 are steps for stopping or prohibiting the reproductionof data when the individual ID data and the second digital data areduplicated in the case where duplication of data is carried out from thedisc-shaped recording medium on which the second digital data isrecorded in the different recording format from that of the firstdigital data in addition to the digital data. One or both of these stepsmay be omitted.

As a specific example of the discrimination operation at step S43 andthe like with respect to whether the individual ID data exists or not,the operation to discriminate whether the individual ID data is normallyrecognized or not, in the case where the format of the individual IDdata or identification information shown in FIG. 2 is used, will now bedescribed in detail with reference to FIG. 5.

At step S161 shown in FIG. 5, the individual ID data or identificationinformation of the format shown in FIG. 2 is inputted to or received bythe reproducing device shown in FIG. 3. Then, at the next step S162,error correction using the error correction code (ECC-B) is carried out,and at step S163, whether the error correction normally ended or not isdiscriminated. When the result is YES, that is, when it is determinedthat the error correction was normally made, the processing goes to stepS164. When the result is NO, the processing goes to step S170 to makeretrial. At step S164, the 128-bit encrypted data in the encryption areashown in FIG. 2 is decoded and the processing goes to step S165 to carryout error check using the 16-bit error correction code (ECC-A) or errordetection code (EDC-A).

At step S166, whether an error is absent or not as a result of the errorcheck using the error correction code (ECC-A) or error detection code(EDC-A) is discriminated, that is, authentication of the individual IDdata is carried out. When the result of discrimination at step S166 isNO (an error exists), the processing goes to step S171 to carry outprocessing for the case of an error. That is, it is recognized thatunauthorized duplication is made on the data recorded on the loadeddisc-shaped recording medium 1, for example, the first digital data, andreproduction prohibition processing for the loaded disc-shaped recordingmedium 1 is carried out. When the result of discrimination at step S166is YES (no error exists), that is, when authentication of the individualID data is normally carried out, the processing goes to step S167 tocarry out authentication or confirmation of the serial number and thelike of the individual ID data shown in FIG. 2. At step S168, it isdiscriminated whether or not authentication of the data such as theserial number and the like of the individual ID data is normally carriedout at step S167. When the result is NO, processing for the case ofauthentication failure is carried out at step S172. When the result isYES, the processing goes to the next step. A series of operation shownin FIG. 5 is equivalent to, for example, the operation at step S43 inFIG. 4, and when the result of discrimination at step S168 is YES, theprocessing goes to the next step S44 shown in FIG. 4.

In the above description, the presence/absence discriminationinformation indicating whether the individual ID data exists or not isrecorded on the disc-shaped recording medium. However, suchpresence/absence discrimination information is not necessarily needed.For example, in the case where the recording position of the individualID data on the disc-shaped recording medium is predetermined, theindividual ID data may be directly read out. FIG. 6 shows an essentialportion of such an example.

Specifically, in FIG. 6, a reproduction RF signal is supplied to anindividual ID reading circuit 27, and if the individual ID data read outby the individual ID reading circuit 27 is present, reproduction iscarried out by a new format reproducing system 28 which reproduces thedisc-shaped recording medium according to the present invention on whichthe second digital data having the different recording format from thatof the first digital data is recorded in addition to the first digitaldata. If the individual ID data is absent, that is, if the individual IDdata is not recorded on the loaded disc-shaped recording medium 1,reproduction is carried out by an old format reproducing system 29 whichreproduces a disc-shaped recording medium such as a CD or DVD on whichonly the first digital data is recorded or which reproduces only thefirst digital data. FIG. 6 illustrates the concept of selecting thereproducing system of the reproducing device in accordance with thepresence/absence of the individual ID data. The new format reproducingsystem 28 and the old format reproducing system 29 need not be providedas independent systems in one reproducing device, and the new formatreproducing system 28 may also have the function of the old formatreproducing system 29.

Meanwhile, it is also possible to record, onto the disc-shaped recordingmedium, additional discrimination information indicating whether or notthe second digital data of the different recording format from that ofthe first digital data is recorded in addition to the first digital dataon the disc-shaped recording medium, and discriminate thepresence/absence of the individual ID data in accordance with theadditional discrimination information. Moreover, it is possible todetermine that the second digital data is recorded by a predeterminedrecording method using a recording pit different from that of therecording method for the first digital data, for example, by a method ofchanging the shape or position of the recording pit in the direction oftrack width, so as to discriminate the type of the disc-shaped recordingmedium, and thus discriminating the presence/absence of the individualID data, instead of recording the additional discrimination informationindicating the presence/absence of the recording of the second digitaldata onto the disc-shaped recording medium.

The procedure for manufacturing a disc on which the discriminationinformation or individual ID data is recorded as described above willnow be described with reference to FIG. 7.

In FIG. 7, a photoresist is applied onto an original glass disc at aresist application step 51, and at the subsequent cutting step 52, a pitpattern made up of recesses and protrusions corresponding to the data tobe recorded is cut, thus preparing an original disc. This cutting iscarried out by using a cutting device for laser cutting as shown in FIG.8, which will be described later.

At a development and fusing step 53, development and fusing processesare performed on the original disc on which the pit pattern is cut bylaser cutting, and at an original metal disc preparation step 54,electroplating is performed on the surface of the disc, thus preparingan original metal disc as a mother disc. Then, at a stamper forming step55, a stamper based on the original metal disc is produced, and at asubstrate forming step 56 using the stamper, a disc substrate made of atransparent resin such as polycarbonate (PC) or acrylic is produced. Thepit pattern formed on the original disc at the cutting step istransferred to the disc substrate thus manufactured. At the subsequentreflection film forming step 57, a reflection film is formed bysputtering on the side of the disc substrate where the pit pattern isformed, a reflection film is formed.

After the final manufacturing step of the recording medium or at a steparound the final step, the identification information or individual IDdata is recorded onto the disc-shaped recording medium 1 according tothe present invention. The identification information or individual IDdata is recorded by using the reflection film formed on the disc-shapedrecording medium 1.

The reflection film used for the disc-shaped recording medium accordingto the present invention is made of a material which enables recordingof data in order to enable recording of the identification informationor individual ID data at a later step. Also, the reflection film must bemade of a material which enables optical reading of the identificationinformation or individual ID data recorded thereon.

Thus, the reflection film used for the disc-shaped recording mediumaccording to the present invention is made of a material which hasapproximately the same reflectance as a reflection film of a CD or DVD,or a reflectance enabling reading by a conventional optical head, andsuch that the reflectance of a light beam like a laser beam for readingis changed by electrothermal recording with a laser beam. Specifically,the reflection film is made of a metal film such that the reflectancefor a light beam for reading is changed within a range of approximately0.5% to 10% by electrothermal recording. More specifically, thereflection film is made of an Al alloy film of Al_(100-x)X_(x), which isa metal film containing Al as a principal component, or an Ag alloy filmof Ag_(100-x)X_(x), which is a metal film containing Ag as a principalcomponent.

On the reflection film, which is formed on the disc substrate and onwhich the identification information or individual ID data is recorded,an ultraviolet-setting resin is applied by spin coat and ultravioletrays are cast thereto, thus forming a protection film, at a protectionfilm application step 58.

The recording of the identification information or individual ID datamay be carried out at an information recording step which is carried outafter the formation of the reflection film on the disc substrate. Therecording of the identification information or individual ID is carriedout by electrothermal recording in which a laser beam is cast onto thereflection film to modulate the reflectance.

An example of the cutting device used at the cutting step 52 in theabove-described manufacturing process, shown in FIG. 7, for thedisc-shaped recording medium, will now be described with reference toFIG. 8.

In the cutting device used in this example, a He—Ne gas laser, an Ar gaslaser or the like is used as a laser light source 61 used for cutting apit pattern corresponding to data to be recorded, as shown in FIG. 8.

A laser beam emitted from the laser light source 61 is supplied to alight modulator 62 and the laser beam is modulated by the lightmodulator 62 in accordance with the data to be recorded. The laser beammodulated by the light modulator 62 is reflected by a reflection mirror66 and cast onto an original glass disc 67 coated with a resist. Thereflection mirror 66 is movably displaced by a moving mechanism, notshown, so that the laser beam from the light modulator 62 scans theinner and outer circles of the original glass disc 67.

The light modulator 62 used in this case has an EOM (electro-opticmodulator) 62 a with its reflectance changed by an applied voltage basedon the recording data, and an EOD (electro-optic deflector) 62 b withits deflection changed by the applied voltage based on the recordingdata. In place of these EOM and EOD, an AOM (acousto-optic modulator)and an AOD (acousto-optic deflector) of a type such that coarse to finewaves of ultrasonic waves are generated in the medium by a piezoelectricelement may be used.

Information such as a music tune, which is a content constituting thefirst digital data to be recorded, for example, on the basis of the CDformat, onto the disc-shaped recording medium 1 of the presentinvention, is inputted from a first information supply source 63 as thesource of this information to a first data generator 65. The first datagenerator 65 is supplied with a signal from a sub code signal generator64 as well as the information from the first information supply source63. The information and sub code inputted to the first data generator 65is outputted as data converted to the CD format by the first datagenerator 65 and is supplied to the EOM 62 a of the light modulator 62.The EOM 62 a is used for forming a pit pattern based on the CD recordingformat.

Information constituting the second digital data to be recorded onto thedisc-shaped recording medium 1 on the basis of a different recordingformat from that of the first digital data, like information added tothe first digital data or information constituting work data or the likeseparate from the first digital data, is inputted from a secondinformation supply source 68 to a second data generator 69. Theinformation inputted to the second data generator 69 is outputted by thesecond data generator 69 as data of a different recording format fromthat of the first digital data and is supplied to the EOD 62 b of thelight modulator 62. The EOD 62 b is used for recording the seconddigital data, for example, by displacing recording pits constituting thepit pattern based on the first digital data into the direction of trackwidth orthogonal to the extending direction of the recording track.

The disc-shaped recording medium according to the present invention onwhich the second digital data corresponding to the second work data isrecorded in addition to the first digital data corresponding to thefirst work data and on which the identification information orindividual ID data for carrying out identification proper to therecording medium is recorded, as described above, can be used forvarious purposes by using the individual ID data and the URL (universalresource locater) included in the second digital data as the address ofa distribution source for the work data or of a writer such as aperformer via a communication network like the Internet.

The method for using the disc-shaped recording medium according to thepresent invention will now be described with reference to FIG. 9.

First, at step S31, a user purchases the above-described disc-shapedrecording medium 1 according to the present invention from adistribution source such as a record company. At step S32, aninformation processing device such as a personal computer having acommunication function which enables connection to a communicationnetwork such as the Internet is used as a reproducing device, thusreading out the data recorded on the disc-shaped recording medium 1. Atstep S33, the URL included in the second digital data and the individualID data are read out.

At step S34, on the basis of the URL read out from the loadeddisc-shaped recording medium 1, the homepage of the distribution sourcesuch as the record company supplying the work data or of the writer suchas the performer is accessed via the communication network, and theindividual ID data read out from the disc-shaped recording medium 1 isauthenticated. On the basis of the authentication of the individual IDdata, it becomes possible to receive the provision of various servicesfrom the record company or the performer. Specifically, the disc-shapedrecording medium 1 according to the present invention is linked to thehomepage of the medium distribution source such as the record company orof the writer such as the performer. The homepage manager or homepagemanagement program authenticates the validity of the individual ID datadistributed from the reproducing device for reproducing the disc-shapedrecording medium 1 and the number of times of access, and providesvarious services. Such various services include no-charge viewing of anInternet live program of the performer, distribution of discount ticketsof a concert, sending of image information related to the work datarecorded on the disc-shaped recording medium 1, and so on. It is alsopossible to carry out various types of lot on the basis of theindividual ID data. This can also be carried out at a store selling therecording medium 1 or a concert hall, other than via the communicationnetwork such as the Internet.

The state of reading out the various data and information recorded onthe disc-shaped recording medium 1 according to the present invention bya personal computer 36 with a communication function and then carryingout communication with a server 39 owned or managed by the recordcompany as the distribution source of the recording medium 1, in asystem as shown in FIG. 10, will now be described with reference to FIG.11.

In the flowchart of FIG. 11, rectangular blocks with round cornersrepresent processing on the side of the user who purchased thedisc-shaped recording medium 1, and rectangular blocks with right-angledcorners represent processing of the side of the server such as therecord company.

In FIG. 11, at step S101, the user loads the disc-shaped recordingmedium 1 of the present invention to the personal computer 36 used asthe reproducing device. At step S102, the user reads out data related tothe URL, which is the network address of the homepage of the server,recorded as the second digital data on the disc-shaped recording medium1. At step S103, the user accesses the homepage corresponding to the URLthus read out. At step S104, the server 39 requests transmission of theindividual ID data. At step S105, the server 39 carries outauthentication of the individual ID data recorded as the second digitaldata on the disc-shaped recording medium 1 and discriminates whether theindividual ID data is normally authenticated or not. This authenticationof the individual ID data is carried out, for example, in accordancewith the procedure shown in FIG. 5. When the authentication of theindividual ID data is OK, the server 39 at the next step S106 requeststhe user to transmit the data on the recording medium 1 and at the nextstep S107 discriminates whether authentication of the contents of themedium is OK or not. In accordance with these steps S106 and S107,authentication is not normally carried out if the user does not have thedisc-shaped recording medium itself even though only the information ofindividual ID data and URL is obtained from another source. Therefore,whether the user has the recording medium or not can be discriminated.

As the data on the medium that is requested to be transmitted at stepS106, for example, data for authentication recorded in advance at apredetermined position of the second digital data recorded on thedisc-shaped recording medium, or data recorded at an arbitrary positionon the disc-shaped recording medium 1 designated by the server is used.

When it is determined at step S105 or S107 that authentication of theindividual ID data or authentication of the contents of the medium isnot normally carried out as a result of transmission failure of a partof the second digital data from the user's personal computer, forexample, data indicating a notice like “you cannot receive any servicewith this disc” is transmitted to the personal computer 36 on the userside and is displayed as a warning on a display connected to thepersonal computer 36 so as to notify the user, at step S112.

When it is determined at step S107 that authentication of the contentsof the medium is normally carried out, the processing goes to step S108and a download menu of the service is transmitted from the server 39 tothe personal computer 36 on the user side and displayed on the displayof the personal computer 36 on the user side. Items of the download menuinclude data related to the first digital data on the disc-shapedrecording medium 1, for example, poster, jacket, lyrics, liner notes,interview article, new song guide, concert ticket lot, Internet liveviewing, sing-along music (karaoke), graffiti and the like. At stepS109, the user selects a menu. At the next step S110, the server carriesout recheck or lot of the individual ID data. When the result of recheckor lot of the individual ID data is OK, the server provides a downloadservice at step S1. When there is a certain trouble in the result ofrecheck or lot of the individual ID data (NG), the server causes thedisplay of the user's personal computer 36 to display theabove-described notice of step S112, if necessary, and shifts to thestate of waiting for the menu selection of step S109.

FIG. 12 shows the procedure of FIG. 11 further in detail, andparticularly shows a specific example in which a key for decryption isobtained from the server 39 whose the homepage is indicated by the URL,in the case where data equivalent to encrypted contents is included inthe second digital data recorded on the disc-shaped recording medium 1manufactured in accordance with the present invention, or in the casewhere data equivalent to encrypted contents is included in the firstdigital data equivalent to the main work data recorded on a CD-ROM orthe like.

In FIG. 12, at step S121, the user loads the disc-shaped recordingmedium 1 according to the present invention to the personal computer 36used as the reproducing device. At step S122, the user reads out datarelated to the URL, which is the network address of the homepage of theserver, recorded as the second digital data in the different recordingformat from that of the first digital data recorded on the disc-shapedrecording medium 1.

In the example shown in FIG. 12, it is assumed that there are aplurality of homepages that can be accessed. At step S123, URLscorresponding to the plurality of homepages A, B, C, . . . are selected.When the homepage A is selected, access to the homepage A is tried atstep S124 and the homepage A is accessed at step S141 on the server 39side. On the server 39 side, at the next step S142, the user name isrequested. In response to this, on the user side, the user name isentered at step S125.

The entered user name is sent to the server 39 side. At step S143, theuser name is stored (registered) to the server, and at the next stepS144, a request for transmission of the individual ID data recorded onthe disc-shaped recording medium 1 is outputted. On the user side, atstep S126, the individual ID data is read out from the disc-shapedrecording medium 1 and transmitted to the server 39. On the server 39side, at step S145, the individual ID data transmitted from the userside is authenticated and stored, and at step S146, it is discriminatedwhether authentication is OK or not. When the result of authenticationis NO, the server 39 at step S132 prohibits the user from accessing thehome page A and causes the display of the user's personal computer 36 todisplay an error. At the same time, on the server side, at step S154,the communication record TR (transaction) is recorded and communicationis ended.

When it is determined at step S146 that authentication of the individualID data is done, the server at step S147 requests transmission of apredetermined part of the second digital data. In response to thistransmission request, the user's personal computer 36 at step S127 readsout and transmits the designated part of the second digital data on thedisc-shaped recording medium 1 to the server 39 side. The server 39 atstep S148 carries out authentication of the part of the second digitaldata transmitted thereto. At step S149, the server 39 discriminateswhether authentication of the second digital data transmitted thereto isOK or not.

These steps S147 to S149 are equivalent to the request for transmissionof data on the medium and the authentication of steps S106 and S107shown in FIG. 11. In the case where the result of discrimination is NOat step S149 because the second digital data transmitted from the user'spersonal computer 36 is different from the data managed on the server 39side or because no response is sent back from the personal computer 36,the server 39 at step S133 prohibits the user from accessing thehomepage A and causes the display of the user's personal computer 36 todisplay an error. At the same time, on the server 39 side, at step S155,the communication record TR (transaction) is recorded and communicationis ended. When it is determined at step S149 that authentication is OK,the server 39 proceeds to step S150, for example, to request accountingfor decryption. In this case, the user at step S128 selects whether toapprove accounting or not. If the user disapproved accounting at stepS128, the server 39 of the homepage A is notified of the disapproval ofaccounting. The server 39 side at step S156 records the communicationrecord TR and ends communication. At the same time, the user sidereturns to step S123 to shift to the URL selection state for accessing ahomepage. If the user approved accounting at step S128, the server 39side carries out accounting at step S151, and then generates andtransmits decryption key data K_(ID) to the user's personal computer 36at step S152. After that, at step S153, the server 39 side records thecommunication record TR and ends communication.

It is preferred that the decryption key data K_(ID) is obtained byencoding or encrypting key data K for decoding the digital dataequivalent to the encrypted work data, using the serial number or thelike of the disc-shaped recording medium 1 included in the individual IDdata, so that the decryption key data K_(ID), when stolen, cannot beused without the individual ID data.

Next, at step S129, the user's personal computer 36 decodes or decryptsthe decryption key data K_(ID) by using the individual ID data, thusobtaining the key data K for data decoding. At the next step S130, thepersonal computer 36 decodes or decrypts the data equivalent to theencrypted work data by using the key data K, and the personal computer36 reproduces the digital data at step S131.

A reproducing device for explaining a method for duplication/duplicationcontrol or duplication/duplication management using the individual IDdata recorded on the disc-shaped recording medium 1 will now bedescribed with reference to FIG. 13. In FIG. 13, the same parts as inthe structure shown in FIG. 3 are denoted by the same numerals and willnot be described further in detail.

In the case of a conventional disc-shaped recording medium as a widelydistributed package medium on which individual ID data for carrying outidentification proper to the recording medium as in the disc-shapedrecording medium 1 according to the present invention is not recorded,when work data recorded on the recording medium is duplicated, whichdisc-shaped recording medium is used as an original for duplication isnot known. Therefore, it is difficult to regulate illegal duplicationand illegal distribution of work data.

On the disc-shaped recording medium 1 according to the presentinvention, individual ID data is recorded by using a watermark. Thiswatermark is recorded by so-called data hiding to embed the watermark sothat there is no trouble in the case of reproducing and viewing the workdata, for example, by spread spectrum. Thus, the watermark (WM) isembedded in data not only in the case of outputting a digital signal butalso in the case of outputting an analog signal converted from digitaldata, and even if duplication is repeated, the watermark (WM) is handedover into the duplicated data. Therefore, it is possible to find thesource and record of the data.

Specifically, in FIG. 13, the work data obtained from an EFMdemodulation circuit 13 via a CIRC (cross interleave Reed-Solomon code)error correction circuit 19 is sent to an adder 20. The individual IDdata obtained from an RF amplifier 12 is identified and taken out by anindividual ID identification circuit 161 and is sent to a watermark (WM)generation circuit 162. The individual ID data is converted watermark(WM) data by the generation circuit 162 using a method of spreadspectrum or the like. The individual ID data as the watermark (WM) datais sent to the adder 20, and the individual ID data as the watermark(WM) data is superimposed and added to the work data itself by the adder20. The work data having the watermark (WM) data superimposed thereon,outputted from the adder 20, is taken out as a digital output from anoutput terminal 163, or is converted to an analog signal by a D/A(digital/analog) converter 164 and then taken out as an analog outputfrom an output terminal 165.

The work data having the watermark (WM) data superimposed thereon,outputted from the adder 20 constituting the device shown in FIG. 13,may be sent to an encryption circuit 166, then encrypted by theencryption circuit 166 using at least a part of information of theindividual ID data from the individual ID identification circuit 161 asan encryption key, and taken out from an output terminal 167. Thus, theencrypted data output becomes an encrypted output proper to theindividual ID data and having extremely high safety.

Meanwhile, in the above-described example, the second digital datarecorded on the disc-shaped recording medium according to the presentinvention includes information indicating an address for connection to anetwork, like URL for access to a homepage on a communication network.However, the second digital data may also include, for example,information for connection to a portable telephone. Also, there may beconstructed a data service system in which connection to a network or aportable telephone is made by using the second digital data and in whichthe depth of connection and the level of available services arecontrolled in accordance with the individual ID data.

As described above, the lot may be carried out using the individual IDdata as a lot number. Moreover, when supplying disc-shaped recordingmedia on the market, it is possible to enable discrimination between theindividual ID data of a rental disc and the individual ID data of a discfor sale and to prevent reception of a part of services of the disc forsale with the individual ID data of the rental disc. Furthermore, thedisc-shaped recording medium according to the present invention may havea multilayer disc structure having a plurality of recording layers forrecording data thereon, in which the first digital data based on the CDformat is recorded on the first layer while the second digital data isrecorded on the second layer by lowering the reflectance of a light beamfor data reading emitted from an optical head so as to prevent thesecond digital data from being read by an existing disc reproducingdevice.

Meanwhile, since the identification information or individual ID dataenabling identification proper to the recording medium is recorded onthe disc-shaped recording medium according to the present invention, thedisc-shaped recording medium can be used for various purposes. Thus, itis possible to construct a data processing system which enablesprovision of various services to a user who properly purchases and usesthe disc-shaped recording medium from a proper distribution source.

On the disc-shaped recording medium used here according to the presentinvention, a work identification code for identifying individual workdata recorded in the data recording area is recorded in the individualID data, as shown in FIG. 14. The work identification code is recordedin accordance with ISRC. The individual ID data including ISRC isencrypted in accordance with a common key system like the RSA public keysystem or the DES system, as described above.

The disc-shaped recording medium used here allows free duplication ofdata recorded thereon. In the case of duplicating the data, theindividual ID data is duplicated in the encrypted state. By obtaining akey for decryption from the distribution source such as a recordcompany, reproduction of the work data is made possible.

A medium owner A1 who properly obtained a disc-shaped recording medium101 constituted as a package medium according to the present inventionby purchasing from a distribution source such as a record company readsout at least individual ID data recorded on the disc-shaped recordingmedium 101 by using a reproducing device of an information processingdevice 102 such as a personal computer with a communication function toenable connection to a communication network like the Internet, andtransmits the read-out individual ID data together with owneridentification ID data such as URL specifying the medium owner A1 to asettlement center 103 of the record company of the distribution source,which functions as a data processing organization, as shown in FIG. 15.The settlement center 103 registers the individual ID data and the owneridentification ID data transmitted from the medium owner A1 andspecifies the medium owner A1 of the disc-shaped recording medium 101.The URL of the settlement center 103 is recorded on the disc-shapedrecording medium 101 in order to enable access to the settlement center103.

On the other hand, the medium owner A1 can produce a duplicate recordingmedium 111 to which the data recorded on the disc-shaped recordingmedium 101 is duplicated by using the information processing device 102,in order for a secondary user B1 to use the duplicate recording medium111. On the duplicate recording medium 111, the individual ID data aswell as the work data recorded on the original disc-shaped recordingmedium 101 is duplicated. In this case, the individual ID data isduplicated as it remains in the encrypted state.

The secondary user B1 who obtained the duplicate recording medium 111reads out data related to the URL of the settlement center 103 recordedon the duplicate recording medium 111 by using a reproducing device ofan information processing device 112 such as a personal computer with acommunication function, then accesses the settlement center 103 on thebasis of the read-out data related to the URL, and is subject toauthentication of the individual ID data read out from the duplicaterecording medium 111. In this case, the settlement center 103 carriesout accounting for the secondary user B1. When accounting is correctlycarried out, the settlement center 103 provides data related to a keyfor decrypting the encrypted individual ID data to the secondary user B1and decodes the data related to the key obtained similarly to theabove-described step S129 by using the individual ID data, thus enablingreproduction of the work data recorded on the duplicate recording medium111.

Similarly, another medium owner A2 who properly obtained a disc-shapedrecording medium 101 from a distribution source such as a record companycan produce a duplicate recording medium 111 and let other secondaryusers B2, B3 use the duplicate recording medium 111, as shown in FIG.15. In this case, too, the secondary users B2, B3 are subject toauthentication of the individual ID data of the duplicate recordingmedium 111 and accounting at the settlement center 103 and obtain datarelated to a key, thus enabling reproduction of the work data recordedon the duplicate recording medium 111.

Moreover, another medium owner A3 who properly obtained a disc-shapedrecording medium 101 from a distribution source such as a record companycan produce a duplicate recording medium 111 and let other secondaryusers B4, B5, . . . , Bn use the duplicate recording medium 111. In thiscase, too, the secondary users B4, B5, . . . , Bn are subject toauthentication of the individual ID data of the duplicate recordingmedium 111 and accounting at the settlement center 103 and obtain datarelated to a key, thus enabling reproduction of the work data recordedon the duplicate recording medium 111.

It is also possible to produce a duplicate recording medium 121 to whichthe data on the duplicate recording medium 111 duplicated from thedisc-shaped recording medium 101 distributed from the distributionsource is duplicated, and let other secondary users C1, C2, . . . , Cnuse the duplicate recording medium 121, as shown in FIG. 15. On theduplicate recording medium 121, too, the individual data recorded on tedisc-shaped recording medium 101 distributed from the distributionsource is duplicated. Similarly, it is also possible to produce aduplicate recording medium on which the data on the duplicate recordingmedium 121 is duplicated, and let other secondary users use it.

The settlement center 103 totals the individual ID data of thedisc-shaped recording medium 101 distributed from the distributionsource which are transmitted from the secondary users B1–Bn and C1–Cnusing the respective duplicate recording media 111, 121, and thus totalsthe quantity of duplication of each disc-shaped recording medium 101.

In accordance with the quantity of the individual ID data which aretransmitted from the secondary users B1–Bn and C1–Cn using the duplicaterecording media 111, 121 and are totaled for each disc-shaped recordingmedium 101, the settlement center 103 calculates the distribution ratefor distributing a part of the fee collected from the secondary usersB1–Bn and C1–Cn to the medium owners A1–An and thus carries outdistribution of the fee.

As a method for distributing a part of the fee, for example, 5% of thetotal amount of fee, as a total amount of distributed fee T to themedium owners A1–An, distribution is carried out in accordance with thequantity of the individual ID data totaled for each disc-shapedrecording medium.

For example, distribution is carried out in accordance with the totalquantity of each individual ID data. It is now assumed that there arefive medium owners having the disc-shaped recording medium 101distributed from the distribution source, and that the total quantityID1 of the individual ID data of the recording medium owned by the firstmedium owner A1 is 14%, the total quantity ID2 of the individual ID dataof the recording medium owned by the second medium owner A2 is 40%, thetotal quantity ID3 of the individual ID data of the recording mediumowned by the third medium owner A3 is 5%, the total quantity ID4 of theindividual ID data of the recording medium owned by the fourth mediumowner A4 is 5%, the total quantity ID5 of the individual ID data of therecording medium owned by the fifth medium owner A5 is 1%, and thequantity of the individual data of the recording medium owned by anunknown owner is 10%. Then, the amounts of distributed fee received bythe medium owners A1–A5 in accordance with the proportion of totalingare as follows.

The first medium owner A1 receives the distributed fee at a rate of 0.14T. The second medium owner A2 receives the distributed fee at a rate of0.4 T. The third medium owner A3 receives the distributed fee at a rateof 0.05 T. The fourth medium owner A4 receives the distributed fee at arate of 0.05 T. The fifth medium owner A5 receives the distributed feeat a rate of 0.01 T.

If the distributed fee with respect to 10% for the unknown owner is tobe distributed, the first medium owner A1 receives the distributed feeat a rate of 14/90 T and the second medium owner A2 receives thedistributed fee at a rate of 40/90 T. Similarly, the other medium ownersA3–A5 also receive the distributed fee.

In the case where the first to fifth medium owners receive an equalamount of distributed fee irrespective of the total quantity of theindividual ID data, each owner receives the distributed fee at a rate of0.18 T. If the distributed fee with respect to 10% for the unknown owneris to be distributed in this case, each owner receives at a rate of 0.2T.

The distribution of a part of the fee is a reward for contribution tofurther distribution of the work data and the fee is distributed inaccordance with the quantity of duplication. This distribution of thefee is carried out, for example, in accordance with the quantity ofduplication from the disc-shaped recording medium 101 owned by themedium owners A1–An on the basis of the total quantity of duplicaterecording media. The distribution may also be gradient distribution inconsideration of the degree of contribution to distribution of the workdata. For example, distribution rates are provided in accordance withthe order of obtaining the disc-shaped recording medium 101, andgradient distribution is carried out in the order from the first ownerwho produces the duplicate recording medium and registers the owneridentification ID data.

In the above-described example, the distributed fee is provided only tothe medium owners having a total quantity of 10% or more, inconsideration of the degree of contribution to the quantity ofduplication, that is, the degree of contribution to distribution of amusic tune. In this case, the distribution of the fee is carried out asfollows in consideration of the degree of contribution to distributionof a music tune as work data.

That is, the distribution rate for the first medium owner A1 is{(14/(14+40+30)}T=⅙ T. The distribution rate for the second medium ownerA2 is 10/21 T. The distribution rate for the third medium owner A3 is 0.The distribution rate for the fourth medium owner A4 is 5/14 T. Thedistribution rate for the fifth medium owner A5 is 0.

In the case where an equal amount is to be distributed to the mediumowners having a total quantity of 10% or more, the first, second andfourth medium owners receive distribution of the fee, that is, ⅓ T each.

Moreover, a medium owner having a large total quantity of individual IDdata raises the obtained distribution rate to 3/2-th power, inconsideration of the large degree of contribution to distribution of themusic tune.

Furthermore, the distribution rates are caused to be step functions inaccordance with the rate of total quantity. The distribution rate issequentially increased, for example, 0.01 in the case where the rate oftotal quantity of the individual ID data is 1–10%, 0.02 in the casewhere the rate of total quantity is 20–30%, and 0.90 in the case wherethe rate of total quantity is 90–100%.

The distribution of a part of the fee may also be carried out for thesecondary users B1–Bn who produced still another duplicate recordingmedium 121 from the duplicate recording medium 111. This is because thesecondary users B1–Bn, too, contributed to distribution of the workdata.

In the case of producing the duplicate recording medium 111 from thedisc-shaped recording medium 101, some of a plurality of work datarecorded on the disc-shaped recording medium 101 may be selectivelyduplicated by using the ISRC recorded as a part of the individual IDdata.

The medium owner who properly obtained the disc-shaped recording mediumaccording to the present invention can prepare a data site havingcontents of appropriate music tunes selected and combined from theobtained disc-shaped recording medium and carry out distribution of thecontents from this site to a user who requests duplication.

A medium owner A1 who properly obtained a disc-shaped recording medium201 according to the present invention duplicates work data D1, D2, . .. , Dn of desired music tunes from the obtained disc-shaped recordingmedium 201 to a site X which the medium owner A1 manages, as shown inFIG. 16. In this case, the work data D1, D2, . . . , Dn may beduplicated from a plurality of disc-shaped recording media 201. By thususing the plurality of disc-shaped recording media 201 as providingsources of the work data, contents specific to the medium owner A1 areincluded in the site X.

The site X in this case is, for example, a homepage of an individualuser which is laid open to the public so that other users can downloadthe work data from the disc-shaped recording medium 201 via acommunication medium such as the Internet by using a personal computerwith a communication function.

When duplicating the work data from the disc-shaped recording medium201, the individual ID data recorded on the disc-shaped recording mediumis also duplicated.

When duplicating the data from the disc-shaped recording medium 201, themedium owner A1 transmits owner identification ID data like URLspecifying the medium owner A1 together with the individual ID datarecorded on the disc-shaped recording medium 201 to a settlement center203 via a communication medium such as the Internet, and thus carriesout owner registration.

With respect to the data format of the data duplicated to the site X,data such as download URL specifying the site X and bookmark URLcorresponding to each work data are recorded in addition to theindividual ID data including work identification code ISRC foridentifying the work data duplicated from the disc-shaped recordingmedium 201, as shown in FIG. 17.

A person who wants the work data of the contents present at the site Xaccesses the site X, selects all or some of the desired work data D1,D2, . . . , Dn, then downloads the selected work data to his/her ownrecording medium by using a personal computer or the like, and thusprepares a duplicate recording medium 211.

One or a plurality of secondary users B1–Bn who prepared the duplicaterecording medium 211 on the basis of the contents of the site X read outdata related to the URL Of the settlement center 203 which is recordedon the duplicate recording medium 211, then access the settlement center203 on the basis of the read-out data related to the URL, and aresubject to authentication of the individual ID data read out from theduplicate recording medium 211. In this case, the settlement center 203carries out accounting to the secondary users B1–Bn. When accounting isnormally carried out, the settlement center 203 provides data related toa key for decrypting the encrypted work data to the secondary usersB1–Bn and enables reproduction of the work data duplicated and recordedon the duplicate recording medium 211, similarly to the above-describedstep S129. The accounting in this case can be carried out on the basisof the work data as a unit, using ISRC recorded on the duplicaterecording medium 211.

Similarly, another medium owner A2 who properly obtained a disc-shapedrecording medium 201 from a distribution source such as a record companyduplicates work data D1, D2, . . . , Dn of desired music tunes from theobtained disc-shaped recording medium 201 to a site Y which the mediumowner A2 manages, as shown in FIG. 16. When duplicating the data fromthe disc-shaped recording medium 201, the medium owner A2, too,transmits owner identification ID data like URL specifying the mediumowner A2 together with the individual ID data recorded on thedisc-shaped recording medium 201 to the settlement center 203 via acommunication medium such as the Internet, and thus carries out ownerregistration.

Similarly to the case of accessing the site X to prepare the duplicaterecording medium 211 as described above, secondary users B1–Bn who wantthe work data of the contents present at the site Y accesses thesettlement center 203 and are subject to authentication of theindividual ID data read out from the duplicate recording medium 211. Inthis case, the settlement center 203 carries out accounting to thesecondary users B1–Bn. When accounting is normally carried out, thesettlement center 203 provides data related to a key for decrypting theencrypted work data to the secondary users B1–Bn and enablesreproduction of the work data recorded on the duplicate recording medium211.

It is also possible to duplicate the data recorded on the duplicaterecording medium 211 prepared by accessing the site X or Y, thus preparea duplicate recording medium 212, and let other secondary users C1, C2,. . . , Cn use the duplicate recording medium 212. Also, the secondaryusers C1–Cn who use the duplicate recording medium 212 access thesettlement center 203 and are subject to authentication of theindividual ID data read out from the duplicate recording medium 212.Then, accounting is carried out. When accounting is normally carriedout, data related to a key for decrypting the encrypted work data isobtained to enable reproduction of the work data recorded on theduplicate recording medium 212.

In this system, too, the settlement center 203 totals the individual IDdata of the disc-shaped recording medium 201 distributed from thedistribution source, transmitted from the secondary users B1–Bn andC1–Cn who use the respective duplicate recording medium 211, 212, andtotals the quantity of duplication of each disc-shaped recording medium201.

Then, the settlement center 203 distributes a part of the fee collectedfrom the secondary users B1–Bn and C1–Cn to the medium owners A1–An inaccordance with the quantity of the individual ID data which aretransmitted from the secondary users B1–Bn and C1–Cn using the duplicaterecording media 211, 212 and totaled for each disc-shaped recordingmedium 201. As distribution of a part of the fee in this case, gradientdistribution is carried out in consideration of the degree ofcontribution to distribution of the work data.

The data recorded on the disc-shaped recording medium 201 distributedfrom the distribution source is duplicated from one duplicate recordingmedium 211 to another duplicate recording medium 212. Thus, in order toclarify the route of duplication of data, an area for recording theowner identification ID data specifying the duplication source and thedata related to the URL of the site X or Y is provided in the datarecorded on the duplicate recording media 211, 212, as shown in FIG. 18.Every time the data on the disc-shaped recording medium 201 distributedfrom the distribution source or the duplicate recording medium 211 or212 is duplicated, the owner identification ID data and/or the datarelated to the URL of the site X or Y is recorded. As the owneridentification ID data and the data related to the URL of the site X orY are sequentially recorded, which route is used for duplicating thedata is clarified. Also, the first person who duplicated the data fromthe disc-shaped recording medium 201 and thus contributed todistribution, and the last person who contributed to distribution of thedata are clarified. The first person who distributed the data is thefirst person who paid attention to the distributed work data andtherefore contributed largely to distribution of the data. The lastperson who contributed to distribution of the work data is regarded as aperson who raised the degree of attention such as access to the workdata.

Thus, in the case of recording the owner identification ID data and/orthe data related to the URL of the site X or Y, if the area forrecording these data is full, the owner identification ID data and thedata related to the URL of the first person who distributed the data areleft and the old owner identification ID data and data related to theURL are sequentially deleted while new owner identification ID data anddata related to the URL are recorded. By thus recording the owneridentification ID data and the data related to the URL of the site X orY, gradient distribution of the fee in consideration of the degree ofcontribution to distribution of the work data can be easily carried out.

In this example, when duplicating data from the sites of the mediumowners A1–An, the secondary users B1–Bn and C1–Cn may not only carry outduplication to a separately handled recording medium such as amagneto-optical disc, CD-R, CD-RW or a recording medium using a solidstate memory, but also construct a new site using an informationprocessing device such as a personal computer, similarly to the mediumowners A1–An.

In the case of duplicating the data from the disc-shaped recordingmedium distributed from the distribution source and thus preparing aduplicate recording medium in the above-described example, the mediumowner ID may be simultaneously recorded in a part of the data to beduplicated. By recording the medium owner ID data, it is possible toclarify the source of the duplicate recording medium.

In the above-described examples, a part of the fee is distributed to thedistributor of the data as a reward for contribution to distribution ofthe work data. However, this reward is not limited to a part of the feeand various types of rewards may be used such as concert tickets of theperformer of the work data.

In the above description, a disc-shaped recording medium is used as thedata recording medium according to the present invention. However, thedata recording medium of the present invention can also be applied to acard-type recording medium or a tape-shaped recording medium. The datamodulation system is not limited to EFM (8–14 modulation) and variousmodulation systems such as 8–16 modulation can be used. In addition,various modifications and changes can be effected without departing fromthe scope of the present invention.

Meanwhile, it is now assumed that, in the case of carrying out gradientdistribution of a part of the fee generated by duplication of the workdata in consideration of the degree of contribution to distribution ofthe work data, there are 10 generations of medium owners An, including afirst medium owner A1 who first obtained a recording medium from adistribution source, a second medium owner A2 who received distributionof the work data from the first medium owner A1 and thus owns aduplicate recording medium, and a third medium owner A3 who receiveddistribution of the work data from the second medium owner A2 and thusowns a duplicate recording medium. In this case, if it is consideredthat a medium owner of a later generation who received distribution ofthe work data and owns a duplicate recording medium has a higher degreeof contribution to distribution of the work data, the medium ownersreceive distribution of a part of the fee as follows.

That is, a part of the fee is distributed at a rate of ½ to the tenthmedium owner A10 who owns the owner identification ID of the tenthgeneration, ¼ to the ninth medium owner A9 who owns the owneridentification ID of the ninth generation, . . . , ½⁹ to the secondmedium owner A2 who owns the owner identification ID of the secondgeneration, and ½¹⁰ to the first medium owner A1 who owns the owneridentification ID of the first generation.

Alternatively, if it is considered that a medium owner of an earliergeneration has a higher degree of contribution to distribution of thework data, the medium owners receive distribution of a part of the feeas follows.

That is, a part of the fee is distributed at a rate of 1/55 to the tenthmedium owner A10 who owns the owner identification ID of the tenthgeneration, 2/55 to the ninth medium owner A9 who owns the owneridentification ID of the ninth generation, . . . , 9/55 to the secondmedium owner A2 who owns the owner identification ID of the secondgeneration, and 10/55 to the first medium owner A1 who owns the owneridentification ID of the first generation.

Alternatively, if it is considered that the medium owners whodistributed the work data have an equal degree of contribution among the10 generations, a part of the fee is distributed equally toe the mediumowners of the respective generations.

Moreover, if it is considered that the first medium owner who obtainedthe recording medium and distributed the work data and the last mediumowner who received distribution of the work data and owns a duplicaterecording medium have a higher degree of contribution to distribution ofthe work data, a part of the fee is distributed at a rate of 5/30 to thetenth medium owner A10 who owns the owner identification ID of the tenthgeneration, 4/30 to the ninth medium owner A9 who owns the owneridentification ID of the ninth generation, . . . , 4/30 to the secondmedium owner A2 who owns the owner identification ID of the secondgeneration, and 5/30 to the first medium owner A1 who owns the owneridentification ID of the first generation.

In view of the distribution of a part of the fee among the respectivegenerations in accordance with the degree of contribution todistribution of the work data, in the case of recording the owneridentification ID data and/or the data related to the URL of the site Xor Y, the data are recorded for 10 generations immediately before or forthe first 10 generations. Alternatively, by leaving the data for thefirst 2 generations and the data for 8 generations immediately beforeand deleting the data for the other generations, it is possible toconstantly record data for predetermined generations.

In the case where the owner identification ID data is repeatedlyduplicated and recorded, for example, three times or more, the precedingdata or subsequent data is deleted so as to leave data for generationssuitable for use. By thus changing the generations, it is possible torealize maintenance of medium owners in consideration of the degree ofcontribution to distribution of the work data.

INDUSTRIAL APPLICABILITY

According to the present invention, since identification informationwhich enables identification among data recording media of the same typehaving the same work data recorded thereon is recorded on the datarecording medium, management of the data recording medium having thework data recorded thereon can be securely carried out and multiple useof the data recording medium is made possible such as duplication of thework data recorded on one data recording medium for a plurality of timeswithout losing the interest of the copyright holder while carrying outmanagement of the location or the like of the work data recorded on thedata recording medium.

Moreover, according to the present invention, it is possible toduplicate work data while protecting the interest of the writer of thework data recorded on the data recording medium, and the interest of aninformation provider who contributed to distribution of the work data isalso protected. Therefore, further popularization of the distributedwork data can be realized.

1. A data recording medium having recorded thereon: digital dataincluding at least work data, identification information identifying anindividual recording medium, and discrimination information indicatingthe presence/absence of the identification information, wherein theidentification information is recorded in an area on an outer side of alead-out area provided on an outer side of a data recording area wherethe digital data is recorded.
 2. The data recording medium as claimed inclaim 1, wherein the discrimination information is recorded in a lead-inarea provided on an inner side of a data recording area where thedigital data is recorded.
 3. The data recording medium as claimed inclaim 1, wherein the identification information includes serial numberinformation for carrying out identification from other data recordingmedia.
 4. The data recording medium as claimed in claim 1, wherein theidentification information includes work provider information indicatinga provider of the work data included in the digital data.
 5. The datarecording medium as claimed in claim 1, wherein the identificationinformation includes work identification information for identifying therecorded digital data.
 6. The data recording medium as claimed in claim1, wherein the identification information includes manufacturing deviceinformation indicating a manufacturing device of the recording medium.7. The data recording medium as claimed in claim 1, wherein theidentification information is data-converted information.
 8. The datarecording medium as claimed in claim 7, wherein the data-convertedinformation is encrypted data.
 9. The data recording medium as claimedin claim 1, wherein error correction coding is performed on theidentification information.
 10. The data recording medium as claimed inclaim 1, wherein one of error correction coding and error detectioncoding of a plurality of code sequences is performed on theidentification information, and authentication of the identificationinformation is carried out with at least a code of one sequence.
 11. Thedata recording medium as claimed in claim 1, wherein the digital data isrecorded in accordance with a modulation system of one of 8–14modulation or 8–16 modulation.
 12. The data recording medium as claimedin claim 1, wherein the data recording medium is for reproduction only.13. A data recording medium having recorded thereon in advance: firstdigital data including at least work data; second digital data recordedby a different recording method than a recording method used to recordthe first digital data; and identification information for identifyingthe individual recording medium, wherein the identification informationis recorded in an area on an outer side of a lead-out area provided onan outer side of a data recording area where the first and/or seconddigital data is recorded.
 14. The data recording medium as claimed inclaim 13, wherein discrimination information indicating whether at leastone of the second digital data and the identification information existsis recorded in advance of the work data.
 15. The data recording mediumas claimed in claim 13, wherein the discrimination information isrecorded in a lead-in area provided on an inner side of a data recordingarea where the first and/or second digital data is recorded.
 16. Thedata recording medium as claimed in claim 13, wherein the identificationinformation includes serial number information.
 17. The data recordingmedium as claimed in claim 13, wherein the identification informationincludes work provider information indicating a provider of the workdata included in the first and/or second digital data.
 18. The datarecording medium as claimed in claim 13, wherein the identificationinformation includes work identification information for identifying thework data included in the first and/or second digital data.
 19. The datarecording medium as claimed in claim 13, wherein the identificationinformation includes manufacturing device information indicating amanufacturing device of the recording medium.
 20. The data recordingmedium as claimed in claim 13, wherein the identification information isdata-converted information.
 21. The data recording medium as claimed inclaim 20, wherein the data-converted information is encrypted data. 22.The data recording medium as claimed in claim 13, wherein errorcorrection coding is performed on the identification information. 23.The data recording medium as claimed in claim 13, wherein one of errorcorrection coding and error detection coding of a plurality of codesequences is performed on the identification information, andauthentication of the identification information is carried out with atleast a code of one sequence.
 24. The data recording medium as claimedin claim 13, wherein the first and/or second digital data is recorded inaccordance with a modulation system of one of 8–14 modulation and 8–16modulation.
 25. The data recording medium as claimed in claim 13,wherein the data recording medium is for reproduction only.
 26. The datarecording medium as claimed in claim 13, wherein the first digital datais recorded by pit edge recording and the second digital data isrecorded by changing a shape of pits.
 27. The data recording medium asclaimed in claim 13, wherein the first digital data is recorded by pitedge recording and the second digital data is recorded by changing aposition of pits.
 28. The data recording medium as claimed in claim 13,wherein the second digital data is at least one of compressed audiodata, image data, and text data.
 29. A data recording medium havingrecorded thereon in advance: first digital data including at least workdata; second digital data recorded by a different recording method thana recording method used to record the first digital data; andidentification information for identifying the individual recordingmedium, wherein the second digital data includes information forconnecting to a communication network.
 30. A data recording mediumhaving recorded thereon in advance: first digital data including atleast work data; second digital data recorded by a different recordingmethod than a recording method used to record the first digital data;and identification information for identifying the individual recordingmedium, wherein the second digital data includes information forconnecting to a portable telephone.
 31. A data reproducing device forreproducing a data recording medium on which digital data including atleast work data is recorded, the device comprising: discrimination meansfor discriminating whether second work data recorded by a differentrecording method than a recording method used to record first work datais recorded on the data recording medium; and reading means for readingout identification information identifying an individual recordingmedium recorded on the data recording medium, when it is discriminatedby the discrimination means that the second work data is recorded on thedata recording medium.
 32. A data processing system comprising: a datarecording medium having recorded thereon digital data including at leastwork data and having recorded thereon in advance of the work dataidentification information identifying an individual recording medium;information providing means for providing a duplicate recording mediumobtained by duplicating at least the digital data recorded on the datarecording medium and then adding information provider identificationinformation to the duplicated digital data; reproducing means forreproducing the digital data having the information provideridentification information added thereto, recorded on the duplicaterecording medium; and work data managing means to which the informationprovider identification information generated by the informationproviding means and the information provider identification informationrecorded on the duplicate recording medium and reproduced by thereproducing means are transmitted.
 33. The data processing system asclaimed in claim 32, wherein the work data managing means carries outaccounting to the reproducing means, and collates the informationprovider identification information transmitted from the informationproviding means and the information provider identification informationtransmitted from the reproducing means and then totals the collatedinformation provider identification information.
 34. The data processingsystem as claimed in claim 32, wherein the work data managing meanscarries out accounting to the reproducing means when at least theinformation provider identification information recorded on theduplicate recording medium is transmitted from the reproducing means forthe duplicate recording medium.
 35. The data processing system asclaimed in claim 32, wherein the work data managing means providescompensation to the information providing means in accordance with theinformation provider identification information transmitted from atleast the information providing means.
 36. The data processing system asclaimed in claim 35, wherein the work data managing means providescompensation to the information providing means in accordance with aquantity of coincidence between the information provider identificationinformation transmitted from the information providing means and theinformation provider identification information transmitted from thereproducing means.
 37. The data processing system as claimed in claim36, wherein the compensation is a part of a fee charged to thereproducing means.
 38. The data processing system as claimed in claim32, wherein discrimination information indicating the presence/absenceof the identification information is further recorded on the datarecording medium.
 39. A data processing system comprising: informationproviding means for providing information obtained by duplicating atleast digital recorded on a data recording medium having recordedthereon the digital data including at least work data and havingrecorded thereon in advance of the work data identification informationidentifying an individual recording medium and discriminationinformation indicating a presence/absence of the identificationinformation, and then by adding information provider identificationinformation to the duplicated digital data: access means for accessingthe information providing means to download at least the digital dataduplicated from the data recording medium, having the informationprovider identification information added thereto and recorded in theinformation providing means; and work data managing means to which theinformation provider identification information generated by theinformation providing means and the information provider identificationinformation downloaded by the access means are transmitted.
 40. The dataprocessing system as claimed in claim 39, wherein the work data managingmeans carries out accounting to the reproducing means, and collates theinformation provider identification information transmitted from theinformation providing means and the information provider identificationinformation transmitted from the access means and then totals thecollated information provider identification information.
 41. The dataprocessing system as claimed in claim 40, wherein the work data managingmeans carries out accounting to the reproducing means when at least theinformation provider identification information downloaded from theinformation providing means is transmitted from the access means. 42.The data processing system as claimed in claim 39, wherein the work datamanaging means provides compensation to the information providing meansin accordance with the information provider identification informationtransmitted from at least the information providing means.
 43. The dataprocessing system as claimed in claim 42, wherein the work data managingmeans provides compensation to the information providing means inaccordance with the quantity of collation between the informationprovider identification information transmitted from the informationproviding means and the information provider identification informationtransmitted from the access means.
 44. The data processing system asclaimed in claim 42, wherein the compensation is a part of a fee chargedto the access means.
 45. The data processing system as claimed in claim39, wherein discrimination information indicating a presence/absence ofthe identification information is further recorded on the data recordingmedium.
 46. An information providing method for duplicating at leastdigital data recorded on a data recording medium having recorded thereonthe digital data including at least work data and having recordedthereon in advance of the work data identification informationidentifying an individual recording medium, and providing duplicateddigital data, the method comprising the step of providing informationobtained by adding information provider identification information tothe duplicated digital data.
 47. The information providing method asclaimed in claim 46, wherein discrimination information indicating apresence/absence of the identification information is further recordedon the data recording medium.
 48. An information transmitting devicecomprising: at least one terminal section for reproducing a recordingmedium having recorded thereon first digital data related to a work andsecond digital data including identification information identifying anindividual recording medium and address data indicating a homepageaddress; and at least one server section connected to the terminalsection via a communication channel and designated by the address datawherein the server section identifies the identification information ofthe recording medium supplied from at least the terminal section via thecommunication channel, and permits downloading of the digital datarelated to the work to the terminal section when the result ofidentification indicates that the terminal section is a predeterminedkind of terminal section.
 49. The information transmitting device asclaimed in claim 48, wherein the server section permits downloading ofthe digital data related to the work to the terminal section when theresult of identification of the identification information indicatesthat the terminal section is a normal terminal section.
 50. Theinformation transmitting device as claimed in claim 48, wherein theserver section prohibits the terminal section from accessing the serversection when a result of identification indicates that the terminalsection is not a predetermined kind of terminal section.
 51. Theinformation transmitting device as claimed in claim 48, wherein theserver section urges the terminal section to carry out an accountingwhen a result of identification indicates that the terminal section is apredetermined kind of terminal section.
 52. The information transmittingdevice as claimed in claim 51, wherein the server section transmits datarelated to a key for decrypting an encryption of the first digital datato the terminal section when the accounting is carried out by theterminal section.
 53. The information transmitting device as claimed inclaim 52, wherein the terminal section decodes the transmitted datarelated to a key for decrypting the encryption on the basis of theidentification information particular kind of to the medium.
 54. Aninformation transmitting method comprising the steps of: transmittingidentification information of a recording medium from at least oneterminal section for reproducing the recording medium having recordedthereon first digital data related to a work and second digital dataincluding at least identification information identifying an individualrecording medium and address data indicating a homepage address, to aserver section via a communication channel; identifying the transmittedidentification information by the server section; and permitting, by theserver section, downloading of the digital data related to the work tothe terminal section when a result of identification indicates that theterminal section is a predetermined kind of terminal section.
 55. Theinformation transmitting method as claimed in claim 54, wherein theserver section transmits to the terminal section a transmission requestfor transmitting at least a part of the second digital data, after theresult of identification of the identification information indicatesthat the terminal section is a predetermined kind of terminal section.56. The information transmitting method as claimed in claim 55, whereinthe server section at least causes the terminal section to carry out analarm display when no response is returned from the terminal sectionwith respect to the transmission request for transmitting a part of thesecond digital data.
 57. The information transmitting method as claimedin claim 54, wherein the server section prohibits the terminal sectionfrom accessing the server section when the result of identificationindicates that the terminal section is not a predetermined kind ofterminal section.
 58. The information transmitting method as claimed inclaim 54, wherein the server section urges the terminal section to carryout accounting when the result of identification indicates that theterminal section is a predetermined kind of terminal section.
 59. Theinformation transmitting method as claimed in claim 57, wherein theserver section transmits data related to a key for decrypting anencryption of the first digital data to the terminal section whenaccounting is carried out by the terminal section.
 60. The informationtransmitting method as claimed in claim 59, wherein the terminal sectiondecodes the transmitted data related to a key for decrypting theencryption on the basis of the identification information identifyingthe individual recording medium.
 61. An information transmitting methodcomprising the steps of: transmitting identification information of arecording medium from at least one terminal section for reproducing aduplicate recording medium duplicated from the recording medium havingrecorded thereon first digital data related to an encrypted work andsecond digital data including at least identification informationidentifying an individual recording medium, to a host section via acommunication channel; authenticating the transmitted identificationinformation by the host section; requesting the terminal section foraccounting; and transmitting data related to a key for decrypting theencryption of the first digital data to the terminal section when theaccounting is carried out.
 62. The information transmitting method asclaimed in claim 61, wherein the terminal section reproduces the firstdigital data of the duplicate recording medium on the basis of thetransmitted data related to the key.
 63. The information transmittingmethod as claimed in claim 62, wherein the terminal section decodes thetransmitted data related to the key for decrypting the encryption on thebasis of the identification information identifying the individualrecording medium of the duplicate recording medium.
 64. The informationtransmitting method as claimed in claim 61, wherein the host sectiontotals the identification information identifying the individualrecording medium of the recording medium transmitted from the terminalsection and totals a quantity of duplication of each recording medium.65. The information transmitting method as claimed in claim 64, whereinthe host section calculates a distribution rate for distributing atleast a part of a fee collected by the accounting to an owner of therecording medium.
 66. An information transmitting method comprising thesteps of: downloading first digital data together with second digitaldata by at least one terminal section and duplicating the first digitaldata, the first digital data being duplicated from a recording mediumhaving recorded thereon at least the first digital data related to anencrypted work and the second digital data including data identificationinformation of at least the first digital data and identificationinformation identifying an individual recording medium, the firstdigital data being laid open to the public so that the first digitaldata can be downloaded together with the second digital data to usersvia a communication channel; transmitting the downloaded identificationinformation of the recording medium together with the duplicated firstdigital data from the terminal section to a host section via thecommunication channel; authenticating the transmitted identificationinformation by the host section; requesting the terminal section for anaccounting; and transmitting data related to a key for decrypting theencryption of the first digital data to the terminal section when theaccounting is carried out.
 67. The information transmitting method asclaimed in claim 66, wherein the terminal section reproduces the firstdigital data of the duplicate recording medium on the basis of thetransmitted data related to the key.
 68. The information transmittingmethod as claimed in claim 67, wherein the terminal section decodes thetransmitted data related to the key for decrypting the encryption on thebasis of the identification information identifying the individualrecording medium of the duplicate recording medium.
 69. The informationtransmitting method as claimed in claim 66, wherein the host sectiontotals the identification information identifying the individualrecording medium of the recording medium transmitted from the terminalsection and totals a quantity of duplication of each recording medium.70. The information transmitting method as claimed in claim 69, whereinthe host section calculates a distribution rate for distributing atleast a part of a fee collected by the accounting to an owner of therecording medium.
 71. The information transmitting method as claimed inclaim 66, wherein the accounting is carried out on the basis of the dataidentification information.